AWS certs (the biggest cloud company)
Your painful daily paperwork,
done by AI instead.
Invoice checks, Excel input, email replies — AI does that work, and people just click "OK" at the end. The hours you get back go to sales and revenue-making work. Trusted by the Minato HD group (Nihon Joint Solutions), bellows leader Nabel, and 40+ clients from listed companies to solo founders.
AWS certs (the biggest cloud company)
All 12 certs earned
CEO Tominaga earned all in about 1 month
Selected by 2 public accelerators
Minato LABIC × Tokyo Metro
Selected by Minato LABIC and the Tokyo Acceleration Program practical phase (top 40)
Some of Leach's clients (from listed groups, national university corporations and industry leaders to sole proprietors)
Large-scale event planning, operation, advertising and PR
AI development company in legal AI and entertainment
IT solutions company of the Minato HD group, listed on TSE Standard
Top-class Japanese manufacturer of robot protective covers and industrial bellows
Long-established construction hardware leasing company with nationwide locations
Officially recognized venture of Advanced Institute of Industrial Technology
Large-scale event planning, operation, advertising and PR
AI development company in legal AI and entertainment
IT solutions company of the Minato HD group, listed on TSE Standard
Top-class Japanese manufacturer of robot protective covers and industrial bellows
Long-established construction hardware leasing company with nationwide locations
Officially recognized venture of Advanced Institute of Industrial Technology
PROBLEM
Do any of these sound like you?
If even one fits, AI can take it off your plate.
Your accountant is buried in paperwork 6 hours every day
Matching invoices and delivery slips is done by hand
Only one person knows how to do the Excel work
People copy data by hand between tools, email, and PDFs
You want AI but don't know where to start
You tried an AI tool but no one on the floor used it
BEFORE / AFTER
How your company changes with AI
Today (before AI)
- People spend hours every day on paperwork
- Many tasks only one person knows how to do
- People copy data by hand between tools and Excel
- You can't tell if an AI price is fair or not
After AI
- AI reads the papers; people just click "OK"
- Anyone on the team can do the work the same way
- Your existing tools and AI talk to each other
- You clearly see where AI saves or costs you money
Time to win new sales
+100 hours/month
AI accuracy
99%+
Time to start
2 weeks
First chat
30 min free
SERVICES
Two steps — Think and Build — make your company's work much easier.
STEP 1: We plan together which work to give to AI. STEP 2: We build the system that makes AI do it.
AI Advice: Plan how to use AI together
We look at your company's work one by one, and find where AI makes life easiest. Training your team to use AI is included.
Like hiring an AI advisor monthly
from ¥80,000/mo (excl. tax)
- Map out your company's work
- Calculate how much AI will save you
- Train your team to use AI
AI System: Click one button and the work is done
We build a system that does your work for you. Orders, checking, approval, billing — AI does it all. People only click one button at the end.
Hand your company's work to AI
Custom from JPY 30M / Monthly from JPY 250K
- AI does your whole work flow
- Keep using Excel and your existing tools
- Same team builds, runs, and improves it
INDUSTRIES
Works for many kinds of companies
Common work for each industry, automated for you
Factory / Manufacturing
- Match orders with delivery slips
- Turn inspection slips into data
- Handle invoices for you
Construction
- Check quotes and orders
- Make billing and payment smooth
- Organize field reports
Delivery / Logistics
- Type dispatch slips for you
- Turn paper slips into data
- Handle billing and payment
Office / Back-office
- Check expense receipts
- Manage contracts and approvals
- Run internal requests automatically
WHY LEACH
4 reasons companies pick Leach
We start from your real work
We don't pick AI first. We look at your paperwork, tools, and approval steps, then decide where AI helps most.
We don't stop at advice
We don't just talk. We check vendor prices, try things, build, and keep improving — same team, all the way.
Keep using your tools
freee, Excel, email, PDFs — keep them all. No need to throw anything away.
Our CEO calls the tech shots
Our CEO has 12 AWS certs and 9 years at Toshiba research. He decides AI, Web, infra, security — all of it.
CASE STUDIES
Here's how it changed companies like yours
40+ engagements across listed companies, startups, and solo founders
TRUST
Leach in numbers
Worked with Google and McKinsey — 9 years at Toshiba's research lab. Youngest to be sent to the executive office.
2 public accelerators
Minato LABIC & Tokyo Acceleration Program
The Tokyo program selects the top 40 companies. Two public bodies screened our business.
40+ engagements
Support record
From listed companies to solo founders
2 world events in a row
Won at world coding events
US YC-recognized event and Tokyo event
AWS 12 certs
Earned all 12 in ~1 month (rare in Japan)
AWS is the biggest cloud company. 12 certs is rare.
Patent 7086873
Holds an invention patent
Obtained while at Toshiba. Publicly verifiable on the JPO's J-PlatPat.
Every number links to a primary source: AWS certifications on Credly, the patent on J-PlatPat (Japan Patent Office), and awards in the news articles.
CEO MESSAGE
Not just any company — I want one you'd want to introduce to a friend.
Won 3 awards in grad school. Spent 9 years at Toshiba's research lab working with Google and McKinsey at the front line. Earned all 12 AWS certs in about a month. Now I write code 17 hours a day. I built Leach to bring this kind of intensity straight into companies' daily work.
Takuya Tominaga / CEO
Read the full messagePRICING
Pricing depends on how you start
Start small with AI Tech Advisory, or hand the work over with an AI business system. Most clients start with advisory and move on to a system.
Path A: AI Tech Advisory
¥80k / 200k / 300k per month (excl. tax)
Pick from three plans — Lite, Standard, Pro — by how much support and deliverables you need. The CEO works with you directly. Every plan starts with a 1-month trial.
- Lite ¥80k/mo — monthly meeting + chat
- Standard ¥200k/mo — 2×/mo + quote & tech review
- Pro ¥300k/mo — weekly pace + rollout support
Path B: AI business system
from ¥400,000/mo, or custom build from ¥30M
Most companies start with a monthly subscription (from ¥400k); large full-custom builds are one-time (from ¥30M). Either way, we don't just build — we keep improving it with you.
- Perfect fit to your work
- Same team builds and keeps improving
- Fit the AI to your work
FREE CONSULTATION
30 minutes to see where to start
We won't leave you with just "sounds cool." You walk away knowing which work to give to AI, in what order, and how.
What work AI can do
From orders, invoices, paper matching, typing, and internal requests — we pick where to start.
How much it costs vs saves
We split work between people and AI, and give real options: build, advice, or existing tools.
Next concrete step
After the call, we list what you need, what data to check, and the smallest way to start.
Materials (free)
Get our materials, free
20 pages covering AI Advice, AI System, stories, and prices. Useful for sharing inside your company.
FAQ
Q. What kinds of work can AI handle?＋
Repeating work that goes through papers and tools — orders, invoices, matching delivery slips with orders, typing, totals, internal requests. First we map your work, then split what AI does and what people still check.
Q. What will I learn from the free chat?＋
Which work is easy to give to AI, which won't pay off, and whether to start with Advice or with the AI System. If helpful, we share a rough price and what to prepare next.
Q. Can I keep using my current tools?＋
Yes. We design around what you already use — freee, spreadsheets, PDFs, email. We don't change everything. We start where work gets stuck.
Q. How do I choose between Advice and the AI System?＋
If you want regular help on AI direction and vendor prices, pick AI Advice. If you want a specific work done by a system, pick the AI System. In the first 30-min chat, we'll help you decide.
Start with a 30-minute online technical diagnosis
Map the issue and next step before any meeting
Discuss AI, web, AWS, security, vendor quotes, and development decisions online.